[PATCH RESEND i-g-t v4 05/31] lib/igt_tools_stub: add stubs needed by tools

Add stubs for functions used by tools when linking without the
full libigt.so: __igt_skip_check, igt_exit, igt_debugfs_open and
igt_open_forcewake_handle_for_pcidev.

Signed-off-by: Sebastian Brzezinka <[email protected]>
Acked-by: Ashutosh Dixit <[email protected]>
Reviewed-by: Krzysztof Karas <[email protected]>
---
 lib/igt_tools_stub.c | 83 ++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 76 insertions(+), 7 deletions(-)

diff --git a/lib/igt_tools_stub.c b/lib/igt_tools_stub.c
index 9a0ec6217..21dc53f3f 100644
--- a/lib/igt_tools_stub.c
+++ b/lib/igt_tools_stub.c
@@ -21,12 +21,27 @@
  * IN THE SOFTWARE.
  *
  */
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <unistd.h>
+
 #include "igt_core.h"
+#include "igt_debugfs.h"
 
-/* Stub for igt_log, this stub will simply print the msg on stderr device.
- * Domain and log level are ignored.
+/*
+ * Forward declaration only - avoids pulling in the heavy igt_gt.h header.
+ * The type is used as an opaque pointer; this stub always returns -1.
  */
+struct pci_device;
 
+int igt_open_forcewake_handle_for_pcidev(const struct pci_device *pci_dev);
+
+/* Stub for igt_log: print message to stderr; domain and log level are ignored. */
 void igt_log(const char *domain, enum igt_log_level level, const char *format, ...)
 {
 	va_list args;
@@ -36,11 +51,7 @@ void igt_log(const char *domain, enum igt_log_level level, const char *format, .
 	va_end(args);
 }
 
-
-/* Stub for __igt_fail_assert, this stub will simply print the msg on stderr device and
- * exit the application, domain and log level are ignored.
- */
-
+/* Stub for __igt_fail_assert: print failed assertion to stderr and exit. */
 void __igt_fail_assert(const char *domain, const char *file,
 		       const int line, const char *func, const char *assertion,
 		       const char *format, ...)
@@ -49,3 +60,61 @@ void __igt_fail_assert(const char *domain, const char *file,
 		func, assertion);
 	exit(1);
 }
+
+/* Stub for __igt_skip_check: print skip reason to stderr and exit with skip code. */
+void __igt_skip_check(const char *file, const int line,
+		      const char *func, const char *check, const char *format, ...)
+{
+	fprintf(stderr, "%s: %d %s Skipped: %s", file, line, func, check);
+	if (format) {
+		va_list args;
+
+		fprintf(stderr, ": ");
+		va_start(args, format);
+		vfprintf(stderr, format, args);
+		va_end(args);
+	}
+
+	fprintf(stderr, "\n");
+	/* IGT_EXIT_SKIP (77) is the exit code igt_core.c uses for skipped tests. */
+	exit(IGT_EXIT_SKIP);
+}
+
+/* Stub for igt_exit: tools use exit(0) rather than the full igt teardown sequence. */
+__noreturn void igt_exit(void)
+{
+	exit(0);
+}
+
+/*
+ * Stub for igt_debugfs_open: open a debugfs entry for a DRM device directly
+ * by path. device == -1 follows the igt_debugfs_path() convention of
+ * defaulting to the first DRM device (dri/0). When a valid fd is given, the
+ * DRM minor is resolved via fstat() so the correct dri/<minor> directory is
+ * used.
+ */
+int igt_debugfs_open(int device, const char *filename, int mode)
+{
+	char path[PATH_MAX];
+	int drm_minor = 0;
+
+	if (device >= 0) {
+		struct stat st;
+
+		if (fstat(device, &st) == 0 && S_ISCHR(st.st_mode))
+			drm_minor = minor(st.st_rdev);
+	}
+
+	snprintf(path, sizeof(path),
+		 "/sys/kernel/debug/dri/%d/%s", drm_minor, filename);
+	return open(path, mode);
+}
+
+/*
+ * Stub for igt_open_forcewake_handle_for_pcidev: in tool context the driver
+ * keeps the GPU awake; no forcewake handle needed.
+ */
+int igt_open_forcewake_handle_for_pcidev(const struct pci_device *pci_dev)
+{
+	return -1;
+}
-- 
2.53.0